I get this error on random occasions:
Fatal error: Uncaught CurlException: 3: No URL set!
thrown in /****/****/***/****/facebook/facebook-client/base_facebook.php on line 905
I am using the latest php sdk from the GIT repository (downloaded today!). The user is already logged in facebook when this happens.
This behavior started 2 weeks ago out of the blue.
What can be wrong?
UPDATE: When I delete all cookies associated with the domain, the problem is resolved. I think it has to do something with fbm_xxxxxxx and fbsr_xxxxxxxx cookies not being detected correctly. However it can still return at "random" occasions, forcing me to clear all the cookies associated with that domain.
UPDATE: the error occurs on this chunk of code:
try {
$user_profile = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
$isfb = null;
setcookie('fbm_'.$facebook->getAppId(), '', time()-100, '/', '.mydomain.com');
}
which eventually calls this function in base_facebook.php:
protected function makeRequest($url, $params, $ch=null) {
if (!$ch) {
$ch = curl_init();
}
$opts = self::$CURL_OPTS;
if ($this->getFileUploadSupport()) {
$opts[CURLOPT_POSTFIELDS] = $params;
} else {
$opts[CURLOPT_POSTFIELDS] = http_build_query($params, null, '&');
}
$opts[CURLOPT_URL] = $url;
// disable the 'Expect: 100-continue' behaviour. This causes CURL to wait
// for 2 seconds if the server does not support this header.
if (isset($opts[CURLOPT_HTTPHEADER])) {
$existing_headers = $opts[CURLOPT_HTTPHEADER];
$existing_headers[] = 'Expect:';
$opts[CURLOPT_HTTPHEADER] = $existing_headers;
} else {
$opts[CURLOPT_HTTPHEADER] = array('Expect:');
}
curl_setopt_array($ch, $opts);
$result = curl_exec($ch);
if (curl_errno($ch) == 60) { // CURLE_SSL_CACERT
self::errorLog('Invalid or no certificate authority found, '.
'using bundled information');
curl_setopt($ch, CURLOPT_CAINFO,
dirname(__FILE__) . '/fb_ca_chain_bundle.crt');
$result = curl_exec($ch);
}
// With dual stacked DNS responses, it's possible for a server to
// have IPv6 enabled but not have IPv6 connectivity. If this is
// the case, curl will try IPv4 first and if that fails, then it will
// fall back to IPv6 and the error EHOSTUNREACH is returned by the
// operating system.
if ($result === false && empty($opts[CURLOPT_IPRESOLVE])) {
$matches = array();
$regex = '/Failed to connect to ([^:].*): Network is unreachable/';
if (preg_match($regex, curl_error($ch), $matches)) {
if (strlen(@inet_pton($matches[1])) === 16) {
self::errorLog('Invalid IPv6 configuration on server, '.
'Please disable or get native IPv6 on your server.');
self::$CURL_OPTS[CURLOPT_IPRESOLVE] = CURL_IPRESOLVE_V4;
curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
$result = curl_exec($ch);
}
}
}
if ($result === false) {
$e = new FacebookApiException(array(
'error_code' => curl_errno($ch),
'error' => array(
'message' => curl_error($ch)."
".$opts[CURLOPT_POSTFIELDS]."<br/>".$opts[CURLOPT_URL]."
",
'type' => 'CurlException',
),
));
curl_close($ch);
throw $e;
}
curl_close($ch);
return $result;
}
When I echoed $opts[CURLOPT_POSTFIELDS] and $opts[CURLOPT_URL] , both postfields and URL were set properly. Is it possible it's a server issue?
UPDATE: if I wait after some (random amount of) time and refresh the page, everything is fine again.
